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A U-shaped microstrip meander-line (MML) slow wave structure (SWS) is explored for the application in 220 GHz traveling-wave tubes (TWTs). Simulated dispersion characteristics and the coupling impedance are presented for an optimized design. Particle-in-cell (PIC) simulations predict a maximum saturated output power of 9.2 W and a gain of 14.9 dB at 220 GHz, with a 3-dB bandwidth of 210 ~ 224 GHz, under an operating voltage of 7500 V and a sheet-beam current of 50 mA.

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Simulation of Microstrip Meander-Line Slow Wave Structure for a 220 GHz Traveling-Wave Tube

  • 会议论文

  • 发表日期：

    2026年

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  • Zhaoxiang Tan,
  • Lingna Yue,
  • Mengmeng Luo,
  • Zijie Gong,
  • Pengcheng Yin,
  • Huifen Shi,
  • Yanyu Wei

摘要

A U-shaped microstrip meander-line (MML) slow wave structure (SWS) is explored for the application in 220 GHz traveling-wave tubes (TWTs). Simulated dispersion characteristics and the coupling impedance are presented for an optimized design. Particle-in-cell (PIC) simulations predict a maximum saturated output power of 9.2 W and a gain of 14.9 dB at 220 GHz, with a 3-dB bandwidth of 210 ~ 224 GHz, under an operating voltage of 7500 V and a sheet-beam current of 50 mA.